Transfer Reactions As a Tool in Nuclear Astrophysics

Hammache, F.; Séréville, N. de

doi:10.3389/fphy.2020.602920

Cited by 9 publications

(5 citation statements)

References 110 publications

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“…), where (C 2 S ) i is the spectroscopic factor of the ith state and σ i,DC (E c.m. ) is the single-particle direct-capture cross section at the centre-of-mass energy E which is calculated analytically using codes such as TEDCA [2,4].…”

Section: Introductionmentioning

confidence: 99%

Transfer Reactions in Nuclear Astrophysics

Adsley

2023

EPJ Web Conf.

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Transfer reactions are important tool in nuclear astrophysics. These reactions allow us to identify states in nuclei and to find the corresponding energies, to determine if these states can contribute to astrophysical nuclear reactions and ultimately to determine the strength of that contribution. In this paper,the basic details of how transfer reactions may be used in nuclear astrophysics are set out along with some common pitfalls to avoid.

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Section: Introductionmentioning

confidence: 99%

Transfer Reactions in Nuclear Astrophysics

Adsley

2023

EPJ Web Conf.

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“…Direct measurements of astrophysical reactions at stellar energies are very challenging -if at all possible, due to the very small cross-sections of the reactions of interest and the radioactive nature of nuclei involved [15]. Indirect methods are commonly used to calculate the rate of the reactions in explosive stellar environments as is the case for the 25 Al(p,γ) 26 Si reaction, which is dominated at nova temperatures (T ≈ 0.1 -0.4 GK) by low-lying resonance states in 26 Si (S p = 5514 keV [16]).…”

Section: Introductionmentioning

confidence: 99%

Low-lying resonances in Si26 relevant for the determination of the astrophysical Al25(p,γ

et al. 2022

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The 25 Al(p,γ) 26 Si reaction plays a key role in accurately modeling and understanding the nucleosynthesis of the long-lived radioisotope 26 Al observed throughout the Galaxy by γ-ray telescopes via the detection of its 1.809 MeV γ-ray line. The 25 Al(p,γ) 26 Si reaction is responsible for redirecting the flux of nuclear material away from the ground state of the long-lived radioisotope 26 Al ( 26 Al g ) in favor of its short-lived isomer ( 26 Al m ) which bypasses the emission of the 1.809 MeV γ-ray, but is observed in, for example, an excess of the isotopic abundance of 26 Mg in meteorites. Uncertainties in the 25 Al(p,γ) 26 Si reaction rate are dominated by the nuclear properties of low-lying proton-unbound states in 26 Si. A high-sensitivity spectroscopic study of 26 Si was performed at the John D. Fox Accelerator Laboratory at Florida State University, using a neutron/γ-ray coincidence measurement with the 24 Mg( 3 He,nγ) 26 Si reaction. The present measurement solves previous discrepancies in the existence and location of the relevant resonances in 26 Si. Furthermore, the high sensitivity of the study allowed for a direct estimate of the 3 + 3 γ-partial width. The present experimental information combined with previous works provide an updated rate of the 25 Al(p,γ) 26 Si reaction at nova temperatures.

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“…In fact, RIBs have already provided research opportunities otherwise not available with stable elements. As a few examples, RIBs allow for 1) a better understanding of the properties of nuclei, going back to the period of their formation in the early universe 3 ; 2) the investigation of nuclear reactions, far from the stability region, fundamental to the stellar nucleosynthesis 4 ; 3) the determination of the behavior of many-body systems 5 . At Legnaro INFN Laboratory, the a) The author to whom correspondence may be addressed: daniele.scarpa@lnl.infn.it project SPES, which is the acronym for "Selective Production of Exotic Species", is devoted to the development and installment of a second generation ISOL:Isotope Separation On-Line facility 6,7 .…”

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confidence: 99%

New solid state laser system for SPES: Selective Production of Exotic Species project at Laboratori Nazionali di Legnaro

Scarpa

Mariotti²,

Khwairakpam

et al. 2022

Review of Scientific Instruments

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The Selective Production of Exotic Species project is under construction at Laboratori Nazionali di Legnaro-INFN. The aim of the collaboration is to produce highly pure Radioactive Ion Beams (RIBs) from fission fragments of a uranium carbide (UC x) target activated by a cyclotron proton beam. In order to select a specific atomic species, the main tool to be applied is the resonant laser ionization technique. We have just completed the installation of a dedicated all solid state laser system whose elements are tunable to transitions of all the elements/isotopes of interest for the project. The new laser system is based on three Titanium:sapphire laser sources, independently pumped by three Nd:YLF pump lasers, and it can be coupled to two high harmonic generation (second harmonic generation, third harmonic generation, and fourth harmonic generation) setups. The power, wavelength, and position of the laser beams are continuously monitored and stabilized by using automated active systems to improve the beam production stability of RIBs. This paper presents the main features of the laser system and examples of application of a laser ion source, including a first demonstration of photoionization of stable silver, one of the most requested elements for RIB application.

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Transfer Reactions As a Tool in Nuclear Astrophysics

Cited by 9 publications

References 110 publications

Transfer Reactions in Nuclear Astrophysics

Transfer Reactions in Nuclear Astrophysics

Low-lying resonances in Si26 relevant for the determination of the astrophysical Al25(p,γ

New solid state laser system for SPES: Selective Production of Exotic Species project at Laboratori Nazionali di Legnaro

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